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DBA: Linux
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Oracle Database 10g Release 2
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linux, database, installation, All

Installing Oracle Database 10g Release 2 on Linux x86

(RHEL4 and SLES9 covered)


by John Smiley

Learn the basics of installing Oracle Database 10g Release 2 on Red Hat Enterprise Linux or Novell SUSE Enterprise Linux, from the bare metal up (for evaluation purposes only).

Contents
Overview
Part I: Installing Linux
    RHEL4
    SLES9
Part II: Configuring Linux for Oracle
    Verify System Requirements
    Create Directories
    Create the Oracle Groups and User Account
    Configure Linux Kernel Parameters
    Set Shell Limits for the oracle User
Part III: Installing Oracle
    Install the Software
Part IV: Configuring Storage
    Filesystems
    Automatic Storage Management
Conclusion
Appendix

Updated December 2007

Overview

The guide provides a walkthrough of installing an Oracle Database 10g Release 2 database on commodity hardware for the purpose of evaluation.  If you are new to Linux and/or Oracle, this guide is for you. It starts with the basics and walks you through an installation of Oracle Database 10g Release 2 from the bare metal up.

This guide will take the approach of offering the easiest paths, with the fewest number of steps for accomplishing a task.  This approach often means making configuration choices that would be inappropriate for anything other than an evaluation.  For that reason, this guide is not appropriate for building production-quality environments, nor does it reflect best practices.

The Linux distributions certified for Oracle Database 10g Release 2 are:

  • Oracle Enterprise Linux 5 (OEL5)
  • Oracle Enterprise Linux 4 (OEL4)
  • Red Hat Enterprise Linux  5 (RHEL5)
  • Red Hat Enterprise Linux  4 (RHEL4)
  • Red Hat Enterprise Linux 3 (RHEL3)
  • Novell SUSE Linux Enterprise Server 10 (SLES10)
  • Novell SUSE Linux Enterprise Server 9 (SLES9)
  • Asianux 2.0
  • Asianux 1.0

We will cover the RHEL4 and SLES9 distributions only here.

Please note that as an alternative Novell offers the orarun package for installation of SLES9 and Oracle. To use that method instead of the one described here, refer to this Novell-supplied install guide.

This guide is divided into four parts: Part I covers the installation of the Linux operating system, Part II covers configuring Linux for Oracle, Part III discusses the essentials of installing the Oracle Database, and Part IV covers creating additional filesystems and  Automatic Storage Management (ASM)—a new storage option in Oracle Database 10g that greatly simplifies storage administration and management.  The Appendix provides information to help you get started using your new database including how to access the database interactively and how to stop and start the database and related services.

Part I: Installing Linux

This guide assumes a server with the following hardware:

  • 800MHz Pentium III CPU
  • 1024MB of RAM
  • SCSI host adapter (Ultra SCSI 160)
  • Four SCSI disk drives (1 x 9GB + 3 x 36GB)
  • One 100Base-T Ethernet adapter

Your hardware does not have to match this in order to use this guide.  All that is necessary for a basic database install is a single CPU, 1024MB of RAM, and one disk drive (IDE, SCSI, or FireWire) with at least 7GB of free space.

Now, let's walk through the process of installing the Linux operating system on a server. The instructions assume a fresh install of Linux (as opposed to an upgrade), that the server will be dedicated to Oracle, and that no other operating systems or data are on the server.

RHEL4

Oracle Database 10g Release 2 is certified to run the base release of RHEL4 (Advanced Server and Enterprise Server) without updates. If you have update CDs, you can use the boot CD from the update instead of the boot CD from the base release to automatically apply all updates during the installation. All updates from Red Hat are supported by Oracle.

The easiest and fastest way to apply the updates for a fresh install of Linux is to perform the install by using the update CDs. If Linux is already installed or you don't have the updates on CDs, they can be applied through RHN. Because this guide is designed for a fresh Linux install, you'll use the update CDs.

  1. Boot the server using the first CD.
    • You may need to change your BIOS settings to allow booting from the CD.
  2. The boot screen appears with the boot: prompt at the bottom of the screen.
    • Select Enter to continue with a graphical install on the console. (For other installation methods and options, refer to the Red Hat Installation Guide.)
    • The installer scans your hardware, briefly displays the Red Hat splash screen, and then begins a series of screen prompts.
  3. Language Selection
    • Accept the default.
  4. Keyboard Configuration
    • Accept the default.
  5. Welcome Screen
    • Click on Next.
  6. Disk Partitioning Setup
    • A thorough treatment of disk partitioning is beyond the scope of this guide, which assumes that you are familiar with disk partitioning methods.

      (WARNING: Improperly partitioning a disk is one of the surest and fastest ways to wipe out everything on your hard disk. If you are unsure how to proceed, stop and get help, or you will risk losing data!)

      This guide uses the following partitioning scheme, with ext3 for each filesystem:

      The 9GB disk on the first controller (/dev/sda) will hold all Linux and Oracle software and contains the following partitions:
      - 100MB /boot partition
      -1,500MB swap partition—Set this to at least twice the amount of RAM in the system but to no more than 2GB. (Thirty-two-bit systems do not support swap files larger than 2GB.) If you need more than 2GB of swap space, create multiple swap partitions.
      -7,150MB root partition—This partition will be used for everything, including /usr, /tmp, /var, /opt, /home, and more. This approach is purely to simplify installation for the purposes of this guide. A more robust partitioning scheme would separate these directories onto separate filesystems.

  7. Boot Loader Configuration
    • Accept the default.
  8. Network Configuration
    • It is usually best to configure database servers with a static IP address. To do so, click on Edit .
    • A pop-up window appears. Uncheck the Configure using DHCP box, and enter the IP Address and Netmask for the server. Be sure that Activate on boot is checked, and click on OK .
    • In the Hostname box, select manually and enter the hostname.
    • In the Miscellaneous Settings box, enter the remaining network settings.
  9. Firewall Configuration
    • For the purposes of this walk-through, no firewall is configured. Select No firewall
    • Select Disabled on the "Enable SELinux" drop down list. 
    • Click on Proceed when the "Warning - No Firewall" window appears.
  10. Additional Language Support
    • Accept the default.
  11. Time Zone Selection
    • Choose the time settings that are appropriate for your area. Setting the system clock to UTC is usually a good practice for servers. To do so, click on System clock uses UTC.
  12. Set Root Password
    • Enter a password for root, and enter it again to confirm.
  13. Package Installation Defaults
    • Select Customize software packages to be installed.
  14. Package Group Selection
    • Select only the package sets shown here and leave all others unselected. 
    • Desktop
      • X Window System
      • Gnome
    • Applications
      • Graphical Internet (optional)
    • Servers
      • Do not select anything in this group.
    • Development
      • Development Tools
    • System
      • Administration Tools
      • System Tools
        • Add the package 'sysstat' by clicking on the Details link and selecting "sysstat - The sar an iostat system monitoring commands." from the Optional Packages list.
    • Miscellaneous
      • Do not select anything in this group.
    • Click on Next to proceed.
  15. Installing Packages
    • Software will be copied to the hard disk and installed. Change disks as prompted.
  16. Congratulations
    • Remove the installation media from the system, and click on Reboot .
  17. The system automatically reboots and presents a new welcome screen.
    • Click on Next.
  18. License Agreement
    • Read the license agreement. If you agree to the terms, select Yes, I agree to the License Agreement and click on Next.
  19. Date and Time
    • Set the Date and Time.
    • If you want to use an NTP server (recommended), select Enable Network Time Protocol and enter the name of the NTP server.
  20. Display
    • Accept the defaults or change as required.
  21. Red Hat Login
    • Enter your Red Hat Network login and password or create a new one.
  22. System User
    • Create an account for yourself.
    • Do not create an account for oracle at this time. Creating the oracle account is covered later in this section.
  23. Additional CDs
    • Click on Next.
  24. Finish Setup
    • Click on Next.
  25. A graphical login screen appears.
  26. Congratulations! Your RHEL4 software is now installed.

Verifying Your Installation

Required kernel version: 2.6.9-5.0.5.EL  This kernel, or any of the kernels supplied in updates, works with Oracle Database 10g Release 2 .

Check your kernel version by running the following command: 

uname -r

Ex:
# uname -r
2.6.9-22.ELsmp

Once you've completed the steps above, all of the packages required for Oracle Database 10g Release 2 will have been installed.  Verify this using the example below.

Required package versions (or later):
  • binutils-2.15.92.0.2-10.EL4
  • compat-db-4.1.25-9
  • control-center-2.8.0-12
  • gcc-3.4.3-9.EL4
  • gcc-c++-3.4.3-9.EL4
  • glibc-2.3.4-2
  • glibc-common-2.3.4-2
  • gnome-libs-1.4.1.2.90-44.1
  • libstdc++-3.4.3-9.EL4
  • libstdc++-devel-3.4.3-9.EL4
  • make-3.80-5
  • pdksh-5.2.14-30
  • sysstat-5.0.5-1
  • xscreensaver-4.18-5.rhel4.2
  • libaio-0.3.96
  • openmotif21-2.1.30-11.RHEL4.2  (Required only to install Oracle demos.  Installation of Oracle demos is not covered by this guide.)
To see which versions of these packages are installed on your system, run the following command: 
rpm -q binutils compat-db control-center gcc gcc-c++ glibc glibc-common \
gnome-libs libstdc++ libstdc++-devel make pdksh sysstat xscreensaver libaio openmotif21
Ex: 
# rpm -q binutils compat-db control-center gcc gcc-c++ glibc glibc-common \
> gnome-libs libstdc++ libstdc++-devel make pdksh sysstat xscreensaver libaio openmotif21
binutils-2.15.92.0.2-15
compat-db-4.1.25-9
control-center-2.8.0-12.rhel4.2
gcc-3.4.4-2
gcc-c++-3.4.4-2
glibc-2.3.4-2.13
glibc-common-2.3.4-2.13
gnome-libs-1.4.1.2.90-44.1
libstdc++-3.4.4-2
libstdc++-devel-3.4.4-2
make-3.80-5
pdksh-5.2.14-30.3
sysstat-5.0.5-1
xscreensaver-4.18-5.rhel4.9
libaio-0.3.103-3
openmotif21-2.1.30-11.RHEL4.4


SLES9

Oracle Database 10g Release 2 is certified to run on the base release of SLES9. Service Packs and package updates are available from Novell, either on CDs or online via its support portal. In this guide, we will install on the SLES9 base release.

  1. Boot the server, using the SLES9 CD.
    • You may need to change your BIOS settings to allow booting from the CD.
  2. The Novell SLES installation screen appears.
    • Select Installation.
    • The installer scans your hardware and presents the YaST interface.
  3. Language Selection
    • Accept the license agreement.
    • Accept the default, English (US).
  4. Installation Settings
    • Select New Installation.
  5. Partitioning
    • A thorough treatment of disk partitioning is beyond the scope of this guide, which assumes that you are familiar with disk partitioning methods.

      (WARNING: Improperly partitioning a disk is one of the surest and fastest ways to wipe out everything on your hard disk. If you are unsure how to proceed, stop and get help, or you will risk losing data!)

      This guide uses the following partitioning scheme, with ext3 for each filesystem:

      The 9GB disk on the first controller (/dev/sda) will hold all Linux and Oracle software and contains the following partitions:
      - 100MB /boot partition
      -1,500MB swap partition—Set this to at least twice the amount of RAM in the system but to no more than 2GB. (Thirty-two-bit systems do not support swap files larger than 2GB.) If you need more than 2GB of swap space, create multiple swap partitions.
      -7,150MB root partition—this partition will be used for everything, including /usr, /tmp, /var, /opt, /home, and more. This approach is purely to simplify installation for the purposes of this guide. A more robust partitioning scheme would separate these directories onto separate filesystems.

  6. Software
    • Click on the link for Software.
    • The Software Selection screen appears.
    • Click on Detailed Selection.
    • The left-hand window displays a list of software selections. Click on the box next to each selection to select/deselect it.
    • Select the following software (this is the recommended set; all others should be deselected):
      - Basis Runtime System
      - YaST
      - Linux Tools
      - Help & Support Documentation
      - Graphical Base System
      - GNOME System
      - C/C++ Compiler and Tools
      - Analyzing Tools
    • It is recommended that the following items not be installed, as they may conflict with Oracle products providing the same service:
      - Simple Webserver
      - Authentication Server (NIS, LDAP, Kerberos)
  7. Time Zone
    • Set your time zone.
  8. Click on Accept.
  9. A warning box appears. Click on Yes, install when ready to proceed.
  10. Change CDs as prompted by the installer.
  11. Confirm Hardware Detection
    • Network Cards – Click on OK.
  12. Password for "root." the system administrator.
    • Enter the root password and repeat to confirm.
  13. Configure your network interface(s), and click on Next when ready to proceed.
    • Static IP addresses are recommended for servers.
    • There is no need to configure printers, modems, ISDN adapters, or sound in order to build a database.
  14. Test Internet Connection
    • There is no need to connect to the Internet to download release notes or Linux updates. Select No, Skip This Test.
  15. Service Configuration
    • There is no need to configure CA Management or OpenLDAP Server. Select Skip Configuration.
  16. User Authentication Method
    • Select Local(/etc/passwd).
  17. Add a New Local User
    • Create an account for yourself. Do not create the oracle account at this time; we'll do that later.
  18. Release Notes
    • Click on Next
  19. Hardware Configuration
    • Confirm Hardware Detection – Graphics Cards – click on Continue.
    • There is no need to configure sound cards for a database – click on Skip.
    • If the graphics card and monitor have been successfully detected, click on Next. Otherwise, click on the Graphics Cards link and enter the correct information.
  20. Installation Completed
    • Click on Finish.
  21. Congratulations! Your SLES9 software is now installed.
Verifying Your Installation

If you've completed the steps above, you should have all the packages and updates required for Oracle Database 10g Release 2. However, you can take the steps below to verify your installation.

Required kernel version: 2.6.5-7.97 (or later)

Check your kernel version by running the following command: 

uname -r

Ex:
# uname -r
2.6.5-7.97-smp
Other required package versions (or later):
  • binutils-2.15.90.0.1.1-32.5
  • gcc-3.3.3-43.24
  • gcc-c++-3.3.3-43.24
  • glibc-2.3.3-98.28
  • gnome-libs-1.4.1.7-671.1
  • libstdc++-3.3.3-43.24
  • libstdc++-devel-3.3.3-43.24
  • make-3.80-184.1
  • pdksh-5.2.14-780.1
  • sysstat-5.0.1-35.1
  • xscreensaver-4.16-2.6
  • libaio-0.3.98
To see which versions of these packages are installed on your system, run the following command as root:
rpm -q binutils gcc gcc-c++ glibc gnome-libs libstdc++ libstdc++-devel make \
pdksh sysstat xscreensaver libaio

Ex: 
# rpm -q binutils gcc gcc-c++ glibc gnome-libs libstdc++ libstdc++-devel make \
> pdksh sysstat xscreensaver libaio
binutils-2.15.90.0.1.1-32.10
gcc-3.3.3-43.34
gcc-c++-3.3.3-43.34
glibc-2.3.3-98.47
gnome-libs-1.4.1.7-671.1
libstdc++-3.3.3-43.34
libstdc++-devel-3.3.3-43.34
make-3.80-184.1
pdksh-5.2.14-780.7
sysstat-5.0.1-35.4
xscreensaver-4.16-2.6
libaio-0.3.102-1.2

If any of the package versions on your system are missing or the versions are earlier than those specified above, you can download and install the updates from the Novell SUSE Linux Portal.

Part II: Configuring Linux for Oracle

Now that the Linux software is installed, you need to configure it for Oracle. This section walks through the steps required to configure Linux for Oracle Database 10g Release 2.

Verifying System Requirements

To verify that your system meets the minimum requirements for an Oracle Database 10g Release 2 database, log in as root and run the commands below.

To check the amount of RAM and swap space available, run this: 
grep MemTotal /proc/meminfo
grep SwapTotal /proc/meminfo

Ex:
# grep MemTotal /proc/meminfo
MemTotal: 1034680 kB
# grep SwapTotal /proc/meminfo
SwapTotal: 1534196 kB

The minimum RAM required is 1024MB, and the minimum required swap space is 1GB. Swap space should be twice the amount of RAM for systems with 2GB of RAM or less and between one and two times the amount of RAM for systems with more than 2GB.

You also need 2.5GB of available disk space for the Oracle Database 10g Release 2 software and another 1.2GB for the database. The /tmp directory needs at least 400MB of free space. To check the available disk space on your system, run the following command: 

df -h

Ex:
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 6.8G 1.3G 5.2G 20% /
/dev/sda1 99M 17M 77M 18% /boot

The example shows that the /tmp directory does not have its own filesystem. (It's part of the root filesystem for this guide.) With 5.2 GB available, the root filesystem has just enough space for the installation (2.5 + 1.2 + 0.4 = 4.1GB) with a little room left over.

Create the Oracle Groups and User Account

Next, create the Linux groups and user account that will be used to install and maintain the Oracle Database 10g Release 2 software. The user account will be called oracle, and the groups will be oinstall and dba. Execute the following commands as root: 

/usr/sbin/groupadd oinstall
/usr/sbin/groupadd dba
/usr/sbin/useradd -m -g oinstall -G dba oracle
id oracle

Ex:
# /usr/sbin/groupadd oinstall
# /usr/sbin/groupadd dba
# /usr/sbin/useradd -m -g oinstall -G dba oracle
# id oracle
uid=501(oracle) gid=502(oinstall) groups=502(oinstall),503(dba)

Set the password on the oracle account: 

passwd oracle

Ex:
# passwd oracle
Changing password for user oracle.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.

Create Directories

Now create directories to store the Oracle Database 10g Release 2 software and the database files. This guide adheres to the Optimal Flexible Architecture (OFA) for the naming conventions used in creating the directory structure. For more information on OFA standards, see Appendix C of the Oracle Database Installation Guide 10g Release 2 (10.2) for Linux x86.

The following assumes that the directories are being created in the root filesystem. This is done for the sake of simplicity and is not recommended as a general practice. These directories would normally be created as separate filesystems.

Issue the following commands as root: 

mkdir -p /u01/app/oracle
chown -R oracle:oinstall /u01/app/oracle
chmod -R 775 /u01/app/oracle

Ex:
# mkdir -p /u01/app/oracle
# chown -R oracle:oinstall /u01/app/oracle
# chmod -R 775 /u01/app/oracle

Configuring the Linux Kernel Parameters

The Linux kernel is a wonderful thing. Unlike most other *NIX systems, Linux allows modification of most kernel parameters while the system is up and running. There's no need to reboot the system after making kernel parameter changes. Oracle Database 10g Release 2 requires the kernel parameter settings shown below. The values given are minimums, so if your system uses a larger value, don't change it. 

kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=262144
net.core.wmem_max=262144

If you're following along and have just installed Linux, the kernel parameters will all be at their default values and you can just cut and paste the following commands while logged in as root. 

cat >> /etc/sysctl.conf <<EOF
kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=262144
net.core.wmem_max=262144
EOF
/sbin/sysctl -p

Ex:
# cat >> /etc/sysctl.conf <<EOF
> kernel.shmall = 2097152
> kernel.shmmax = 536870912
> kernel.shmmni = 4096
> kernel.sem = 250 32000 100 128
> fs.file-max = 65536
> net.ipv4.ip_local_port_range = 1024 65000
> EOF
# /sbin/sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_max = 262144

Run the following commands as root to verify your settings: 

/sbin/sysctl -a | grep shm
/sbin/sysctl -a | grep sem
/sbin/sysctl -a | grep file-max
/sbin/sysctl -a | grep ip_local_port_range
/sbin/sysctl -a | grep rmem_default
/sbin/sysctl -a | grep rmem_max
/sbin/sysctl -a | grep wmem_default
/sbin/sysctl -a | grep wmem_max

Ex:
# /sbin/sysctl -a | grep shm
kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.shmmax = 536870912
kernel.shm-use-bigpages = 0
# /sbin/sysctl -a | grep sem
kernel.sem = 250 32000 100 128
# /sbin/sysctl -a | grep file-max
fs.file-max = 65536
# /sbin/sysctl -a | grep ip_local_port_range
net.ipv4.ip_local_port_range = 1024 65000
# /sbin/sysctl -a | grep rmem_default
net.core.rmem_default = 262144
# /sbin/sysctl -a | grep rmem_max
net.core.rmem_max = 262144
# /sbin/sysctl -a | grep wmem_default
net.core.wmem_default = 262144
# /sbin/sysctl -a | grep wmem_max
net.core.wmem_max = 262144

For Novell SUSE Linux releases, use the following to ensure that the system reads the /etc/sysctl.conf file at boot time: 

/sbin/chkconfig boot.sysctl on

Setting Shell Limits for the oracle User

Oracle recommends setting limits on the number of processes and open files each Linux account may use. To make these changes, cut and paste the following commands as root: 

cat >> /etc/security/limits.conf <<EOF
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
EOF

cat >> /etc/pam.d/login <<EOF
session required /lib/security/pam_limits.so
EOF

For RHEL4, use the following: 

cat >> /etc/profile <<EOF
if [ \$USER = "oracle" ]; then 
 if [ \$SHELL = "/bin/ksh" ]; then
 ulimit -p 16384
 ulimit -n 65536
 else
 ulimit -u 16384 -n 65536
 fi
 umask 022
fi
EOF

cat >> /etc/csh.login <<EOF
if ( \$USER == "oracle" ) then
 limit maxproc 16384
 limit descriptors 65536
 umask 022
endif
EOF

For SLES 9, use the following: 

cat >> /etc/profile.local <<EOF
if [ \$USER = "oracle" ]; then 
 if [ \$SHELL = "/bin/ksh" ]; then
 ulimit -p 16384
 ulimit -n 65536
 else
 ulimit -u 16384 -n 65536
 fi
 umask 022
fi
EOF

cat >> /etc/csh.login.local <<EOF
if ( \$USER == "oracle" ) then
 limit maxproc 16384
 limit descriptors 65536
 umask 022
endif
EOF

Part III: Installing Oracle

Oracle Database 10g Release 2 can be downloaded from OTN. Oracle offers a development and testing license free of charge. However, no support is provided and the license does not permit production use. A full description of the license agreement is available on OTN.

The easiest way to make the Oracle Database 10g Release 2 distribution media available on your server is to download them directly to the server.

Use the graphical login to log in as oracle.

Create a directory to contain the Oracle Database 10g Release 2 distribution: 

mkdir 10gR2_db

To download Oracle Database 10g Release 2 from OTN, point your browser (Firefox works well) to http://www.oracle.com/technology/software/products/database/oracle10g/htdocs/10201linuxsoft.html. Fill out the Eligibility Export Restrictions page, and read the OTN License agreement. If you agree with the restrictions and the license agreement, click on I Accept.

Click on the 10201_database_linux32.zip  link, and save the file in the directory you created for this purpose (10gR2_db)—if you have not already logged in to OTN, you may be prompted to do so at this point.

Unzip and extract the file: 

cd 10gR2_db
unzip 10201_database_linux32.zip

Install the Software and Create a Database

Log in using the oracle account.

Change directory to the location where you extracted the Oracle Database 10g Release 2 software. 
Ex:
$ cd $HOME/10gR2_db

Change directory to Disk1. 

Ex:
$ cd database

Start the Oracle Universal Installer. 

$ ./runInstaller
  1. Select Installation Method
    • Select Basic Installation
    • Oracle Home Location: /u01/app/oracle/product/10.2.0/db_1
    • Installation Type: Enterprise Edition (1.3GB)
    • UNIX DBA Group:  oinstall
    • Make sure Create Starter Database is checked
    • Global Database Name: demo1
    • Enter the Database Password and Confirm Password
    • Click on Next
  2. Specify Inventory Directory and Credentials
    • Inventory Directory: /u01/app/oracle/oraInventory
    • Operating System group name:  oinstall
    • Click on Next
  3. Product-specific Prerequisite Checks
    • If you've been following the steps in this guide, all the checks should pass without difficulty. If one or more checks fail, correct the problem before proceeding. 
    • Click on Next
  4. Summary
    • A summary of the products being installed is presented.
    • Click on Install.
  5. Configuration Assistants
    • The Oracle Net, Oracle Database, and iSQL*Plus configuration assistants will run automatically
  6. Execute Configuration Scripts
    • At the end of the installation, a pop up window will appear indicating scripts that need to be run as root.  Login as root and run the indicated scripts.
    • Click on OK when finished.
  7. End of Installation
    • Make note of the URLs presented in the summary, and click on Exit when ready.
  8. Congratulations! Your new Oracle Database 10g Release 2 database is up and ready for use.

Part IV: Configuring Storage

The database we created in Part III used a single filesystem for disk storage. However, there are several other ways to configure storage for an Oracle database.

Part IV explores other methods of configuring disk storage for a database. In particular, it describes creating additional filesystems and using Automatic Storage Management (ASM). Use of raw devices and Oracle Cluster File System (OCFS) is covered in the next article in this series which walks through installing Oracle RAC Database 10g Release 2 on Linux x86.

Partition the Disks

In order to use either file systems or ASM, you must have unused disk partitions available.  This section describes how to create the partitions that will be used for new file systems and for ASM.

WARNING: Improperly partitioning a disk is one of the surest and fastest ways to wipe out everything on your hard disk. If you are unsure how to proceed, stop and get help, or you will risk losing data.

This example uses /dev/sdb (an empty SCSI disk with no existing partitions) to create a single partition for the entire disk (36 GB). 

Ex:
# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.


The number of cylinders for this disk is set to 4427.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
 (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/sdb: 255 heads, 63 sectors, 4427 cylinders
Units = cylinders of 16065 * 512 bytes

 Device Boot Start End Blocks Id System

Command (m for help): n
Command action
 e extended
 p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-4427, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-4427, default 4427):
Using default value 4427

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: If you have created or modified any DOS 6.x
partitions, please see the fdisk manual page for additional
information.
Syncing disks.

Now verify the new partition: 

Ex:
# fdisk -l /dev/sdb

Disk /dev/sdb: 36.4 GB, 36420075008 bytes
255 heads, 63 sectors/track, 4427 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1        4427    35559846   83  Linux

Repeat the above steps for each disk to be partitioned.  The following section on Filesystems uses a single disk partition, /dev/sdb1.  The ASM example uses three partitions on three disks: /dev/sdb1, /dev/sdc1, and /dev/sdd1


Filesystems

Filesystems are the most widely used means of storing data file, redo logs, and control files for Oracle databases. Filesystems are easy to implement and require no third-party software to administer.

In most cases, filesystems are created during the initial installation of Linux. However, there are times when a new filesystem must be created after the initial installation, such as when a new disk drive is being installed.

This section describes building a new filesystem and using it in an Oracle database. Unless otherwise noted, all commands must be run as root.

Create the Filesystem

Use ext3 to create this new filesystem. Other filesystems work just as well, but ext3 offers the fastest recovery time in the event of a system crash. 

Ex:
# mke2fs -j /dev/sdb1
mke2fs 1.26 (3-Feb-2002)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
4447744 inodes, 8889961 blocks
444498 blocks (5.00%) reserved for the super user
First data block=0
272 block groups
32768 blocks per group, 32768 fragments per group
16352 inodes per group
Superblock backups stored on blocks:
 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,
 2654208, 4096000, 7962624

Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

Create the Mount Point

A filesystem must have a mount point, which is simply an empty directory where the new filesystem "attaches" to the system's directory tree. Mount points should be given names consistent with the Oracle Flexible Architecture (OFA) standard. For more information on OFA standards, see Appendix C of the Oracle Database Installation Guide 10g Release 2 (10.2) for Linux x86.

Because you have already created the /u01 directory in Part I, use /u02 for this example. 

Ex:
# mkdir /u02

Add the New Filesystem to /etc/fstab

So that the new filesystem will be mounted automatically when the system boots, you need to add a line to the /etc/fstab file that describes the new filesystem and where to mount it. Add a line similar to the one below to /etc/fstab, using a text editor. 

/dev/sdb1 /u02 ext3 defaults 1 1

Mount the New Filesystem

Mounting the filesystem makes it available for use. Until the filesystem is mounted, files cannot be stored in it. Use the following commands to mount the filesystem and verify that it is available. 

mount /u02
df -h /u02

Ex:
# mount /u02
# df -h /u02
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 33G 33M 31G 1% /u02

Create Oracle Directories and Set Permissions

Now you create a directory to store your Oracle files. The directory name used in the example follows the OFA standard naming convention for a database with ORACLE_SID=demo1. 

mkdir -p /u02/oradata/demo1
chown -R oracle:oinstall /u02/oradata
chmod -R 775 /u02/oradata

Create a New Tablespace in the New Filesystem

The new filesystem is ready for use. Next you create a new tablespace in the filesystem to store your database objects. Connect to the database as the SYSTEM user, and execute the CREATE TABLESPACE statement, specifying the data file in the new filesystem. 

Ex:
$ sqlplus

SQL*Plus: Release 10.2.0.1.0 - Production on Sun Nov 27 15:50:50 2005

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Enter user-name: system
Enter password:

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> create tablespace data1
  2  datafile '/u02/oradata/demo1/data1_01.dbf' size 100m
  3  extent management local
  4  segment space management auto;

Tablespace created.

Now you can use the new tablespace to store database objects such as tables and indexes. 

Ex:
SQL> create table demotab (id number(5) not null primary key,
 2 name varchar2(50) not null,
 3 amount number(9,2))
 4 tablespace data1;
 
Table created.
Automatic Storage Management (ASM)

ASM was a new storage option introduced with Oracle Database 10gR1 that provides the services of a filesystem, logical volume manager, and software RAID in a platform-independent manner. ASM can stripe and mirror your disks, allow disks to be added or removed while the database is under load, and automatically balance I/O to remove "hot spots." It also supports direct and asynchronous I/O and implements the Oracle Data Manager API (simplified I/O system call interface) introduced in Oracle9i.

ASM is not a general-purpose filesystem and can be used only for Oracle data files, redo logs, and control files. Files in ASM can be created and named automatically by the database (by use of the Oracle Managed Files feature) or manually by the DBA. Because the files stored in ASM are not accessible to the operating system, the only way to perform backup and recovery operations on databases that use ASM files is through Recovery Manager (RMAN).

ASM is implemented as a separate Oracle instance that must be up if other databases are to be able to access it. Memory requirements for ASM are light: only 64 MB for most systems.

Installing ASM

On Linux platforms, ASM can use raw devices or devices managed via the ASMLib interface. Oracle recommends ASMLib over raw devices for ease-of-use and performance reasons. ASMLib 2.0 is available for free download from OTN. This section walks through the process of configuring a simple ASM instance by using ASMLib 2.0 and building a database that uses ASM for disk storage.

Determine Which Version of ASMLib You Need

ASMLib 2.0 is delivered as a set of three Linux packages:

  • oracleasmlib-2.0 - the ASM libraries
  • oracleasm-support-2.0 - utilities needed to administer ASMLib
  • oracleasm - a kernel module for the ASM library
Each Linux distribution has its own set of ASMLib 2.0 packages, and within each distribution, each kernel version has a corresponding oracleasm package. The following paragraphs describe how to determine which set of packages you need.

First, determine which kernel you are using by logging in as root and running the following command: 

uname -rm

Ex:
# uname -rm
2.6.9-22.ELsmp i686

The example shows that this is a 2.6.9-22 kernel for an SMP (multiprocessor) box using Intel i686 CPUs.

Use this information to find the correct ASMLib packages on OTN:

  1. Point your Web browser to http://www.oracle.com/technology/tech/linux/asmlib/index.html
  2. Select the link for your version of Linux.
  3. Download the oracleasmlib and oracleasm-support packages for your version of Linux
  4. Download the oracleasm package corresponding to your kernel. In the example above, the oracleasm-2.6.9-22.ELsmp-2.0.0-1.i686.rpm package was used.

    Next, install the packages by executing the following command as root: 

    rpm -Uvh oracleasm-kernel_version-asmlib_version.cpu_type.rpm \
    oracleasmlib-asmlib_version.cpu_type.rpm \
    oracleasm-support-asmlib_version.cpu_type.rpm

    Ex:
    # rpm -Uvh \
    > oracleasm-2.6.9-22.ELsmp-2.0.0-1.i686.rpm \
    > oracleasmlib-2.0.1-1.i386.rpm \
    > oracleasm-support-2.0.1-1.i386.rpm
    Preparing...                ########################################### [100%]
       1:oracleasm-support      ########################################### [ 33%]
       2:oracleasm-2.6.9-22.ELsm########################################### [ 67%]
       3:oracleasmlib           ########################################### [100%]

Configuring ASMLib

Before using ASMLib, you must run a configuration script to prepare the driver. Run the following command as root, and answer the prompts as shown in the example below. 

# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.

This will configure the on-boot properties of the Oracle ASM library
driver.  The following questions will determine whether the driver is
loaded on boot and what permissions it will have.  The current values
will be shown in brackets ('[]').  Hitting <ENTER> without typing an
answer will keep that current value.  Ctrl-C will abort.

Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Fix permissions of Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration:           [  OK  ]
Creating /dev/oracleasm mount point:                       [  OK  ]
Loading module "oracleasm":                                [  OK  ]
Mounting ASMlib driver filesystem:                         [  OK  ]
Scanning system for ASM disks:                             [  OK  ]

Next you tell the ASM driver which disks you want it to use. Oracle recommends that each disk contain a single partition for the entire disk.  See Partitioning the Disks at the beginning of this section for an example of creating disk partitions.

You mark disks for use by ASMLib by running the following command as root: 

/etc/init.d/oracleasm createdisk DISK_NAME device_name

Tip: Enter the DISK_NAME in UPPERCASE letters. 

Ex:
# /etc/init.d/oracleasm createdisk VOL1 /dev/sdb1
Marking disk "/dev/sdb1" as an ASM disk:                   [  OK  ]
# /etc/init.d/oracleasm createdisk V